DOI: http://dx.doi.org/10.18203/issn.2454-5929.ijohns20211181

Tympanometry and computed tomography measurement of middle ear volumes in patients with unilateral chronic otitis media

Anuj Kumar Shukla, S. K. Kanaujia, Sandeep Kaushik, Nishant Saurabh Saxena

Abstract


Background: Tympanometry and computed tomography (CT) measurement of middle ear volume in patients with unilateral chronic otitis media.

Methods: The prospective study was conducted on 50 patients of diagnosed unilateral chronic otitis media showing clinical symptoms which affect quality of life. Patients who were fulfilling inclusion criteria after screening were selected for study. We studied patients who had a unilateral tympanic membrane (TM) perforation and a normal TM in the contralateral ear which act as control group to estimate the ME volume in the lesioned ear. Further we have compared pre and postoperative middle ear volume (measured by CT and tympanometry) in control & diseased ear to correlate middle ear volume results obtained by CT and Tympanometry.

Results: The mean value of MEV measured by tympanometry and CT were (1.343±0.580) and (1.106±0.380) respectively (Figure 1). Volume measurement by tympanometry is higher as compared to volume measured by CT in lesioned ear, hence tympanometry measured volume in diseased ear were higher that measured by CT which is closer to normal values in both normal and Diseased ears. Also hearing shows improvement in diseased ear after surgery due to restoration of middle ear volume closer to normal.

Conclusions: It was concluded in our study that CT is more reliable investigation for middle ear volume measurement as compared to Tympanometry in diseased as well as normal ears.


Keywords


Tympanometry, Computed tomography, Middle ear volume, Chronic otitis media

Full Text:

PDF

References


Gaur S, Sinha ON, Bhushan A, Batni G. Observations on Tympanic Membrane Perforations (Safe Type) and Hearing Loss. Indian J Otolaryngol Head Neck Surg. 2017;69(1):29-34.

Mehta RP, Rosowski JJ, Voss SE, O'Neil E, Merchant SN. Determinants of hearing loss in perforations of the tympanic membrane. Otol Neurotol. 2006;27(2):136-43.

Hirsch A. The stapedius reflex tests in retrocochlear hearing disorders. Audiology. 1983;22(5):463-70.

Rosowski JJ, Wilber LA. Acoustic Immittance, Absorbance, and Reflectance in the Human Ear Canal. Semin Hear. 2015;36(1):11-28.

Ahn JY, Park HJ, Park GH, Jeong YS, Kwak HB, Lee YJ, et al. Tympanometry and CT Measurement of Middle Ear Volumes in Patients with Unilateral Chronic Otitis Media. Clin Exp Otorhinolaryngol. 2008;1(3):139-42.

Kim SH, Hong HS, Lee JD, Park MK. Tympanometric volume as a useful tool for the evaluation of middle ear status in chronic otitis media. Ear Nose Throat J. 2018;97(7):E17-E20.

Koc A, Ekinci G, Bilgili AM, Akpinar IN, Yakut H, Han T. Evaluation of the mastoid air cell system by high resolution computed tomography: three-dimensional multiplanar volume rendering technique. J Laryngol Otol. 2003;117(8):595-8.

Mehta RP, Rosowski JJ, Voss SE, O’Neil E, Merchant SN. Determinants of hearing loss in perforations of the tympanic membrane. Otol Neurotol. 2006;27(2):136-43.

Neel HB 3rd, Keating LW, McDonald TJ. Ventilation in secretory otitis media: effects on middle ear volume and eustachian tube function. Arch Otolaryngol. 1977;103(4):228-31.

Molvaer OI, Vallersnes FM, Kringlebotn M. The size of the middle ear and the mastoid air cell. Acta Otolaryngol. 1978;85(1-2):24-32.

Lindeman P, Holmquist J. Measurement of middle ear volume using the impedance audiometer. Am J Otol. 1981;2(4):301-3.

Carpenter, David J. Disagreement in middle ear volume estimation between tympanometry and three-dimensional volume reconstruction in the context of tympanic membrane perforation. J Otol. 2017;12(2):74-9.